<?php
/**
 * OpenPASL
 *
 * Copyright (c) 2008, Danny Graham, Scott Thundercloud
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 *   * Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *   * Neither the name of the Danny Graham, Scott Thundercloud, nor the names of
 *     their contributors may be used to endorse or promote products derived from
 *     this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @license http://www.opensource.org/licenses/bsd-license.php New BSD License
 * @copyright Copyright (c) 2008, Danny Graham, Scott Thundercloud
 */

namespace PASL\Web\Template;

require_once('PASL/Web/Template.php');

use PASL\Web\Template;

/**
 * Token replacement interpreter
 * 
 * @package \PASL\Web\Template
 * @author Scott Thundercloud and Danny Graham
 */
class Token extends Template
{
	/**
	 * Global Token Replacement For Specified Data
	 *
	 * @param String $data
	 * @return String
	 */
	private function parseData($data)
	{
		$body = $data;

		preg_match_all( "/\%(\S+?)\%/", $body, $matches );
		$tokens = array_values( array_unique( array_values( $matches[1] ) ) );

		for ($i = 0; $i < count($tokens); $i++)
		{
			if (isset($this->Variables[$tokens[$i]])) $body = str_replace("%{$tokens[$i]}%", $this->Variables[$tokens[$i]], $body);
			else $body = str_replace("%{$tokens[$i]}%", "", $body);
		}
		return $body;
	}

	/**
	 * Return files parsed for Tokens.
	 *
	 * @param String $url Path to the doc fragment that needs to be parsed
	 * @param Bool $template Is the path to a template that requires the TemplateBasePath.  Defaults to true
	 * @return String
	 */
	public function loadAndParse($url, $template=true)
	{
		preg_match("http://", $url) ? $local = FALSE : $local = TRUE;

		$body = "";

		if ($local)
		{
			$file = array();

			$file = file(($template) ? $this->TemplateBasePath.$url : $url);

			foreach ($file as $line)
			{
				$body .= $line;
			}
		}
		else
		{
			$fp = fopen($url,"r");
			$body = fread($fp,1000000);
			fclose($fp);
		}

		$body = $this->parseData($body);
		return $body;
	}

	/**
	 * Interpret the file.
	 *
	 * @return string Template Data
	 */
	protected function Interpret()
	{
		return $this->loadAndParse($this->File);
	}
}
?>